Wristwatch



FIG. 1 is a top and left front perspective view of a wristwatch showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a rear elevational view thereof;

The broken line showings of wristband ends are environmental only and form no part of the claimed design. 

The ornamental design for a wristwatch, as shown and described. 